A match for the containers? 16th-17th century ivory vases

[Koen G]

What is this container? Is it a single object or just three nesting boxes stacked on top of one another?

I also wondered. Since some of them are stacked off-center and all appear lidded, I suspect they are containers that can fit inside one another like nesting dolls, but have been stacked for display purposes. Just a guess though. Maybe they are displayed for their craftmanship rather than a specific function, though that's hard to tell from the picture.